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Large, 3.8" Parascytalocrinus Crinoid - Crawfordsville, Indiana
This is a large and very 3D, Parascytalocrinus hamiltonensis from the famous Witherspoon crinoid quarry near Crawfordsville, Indiana. They have been cleaned using air abrasives under microscope and shows amazing detail.
It is believed that crinoids from the Ramp Creek Limestone were buried in sediment from nearby deltas during storms. The resulting siltstone deposits are soft enough that fossils can be extracted in exquisite, three-dimensional relief.
It is believed that crinoids from the Ramp Creek Limestone were buried in sediment from nearby deltas during storms. The resulting siltstone deposits are soft enough that fossils can be extracted in exquisite, three-dimensional relief.
Crinoids, sometimes commonly referred to as sea lilies, are animals, not plants. They are echinoderms related to starfish, sea urchins, and brittle stars. Many crinoid traits are like other members of their phylum; such traits include tube feet, radial symmetry, a water vascular system, and appendages in multiples of five (pentameral). They first appeared in the Ordovician (488 million years ago) and some species are still alive today.
SPECIES
Parascytalocrinus hamiltonensis
LOCATION
Witherspoon Quarry, Crawfordsville, Indiana
FORMATION
Ramp Creek Limestone
SIZE
3.8" long on 5.3x3.7" matrix
CATEGORY
SUB CATEGORY
ITEM
#27554
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